Frame for gang-saw mills



(No Model.)

DE WITT G. PRESCOTT. FRAME FOR-GANGISAWMILLS. 7 No. 256,499., I IPatented Apr. 18,1882.

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' 'NrT-ED STATES PATENT I OrFrcE.

DE WITT O. PRESCOTT, OF MARINETTE, WISCONSIN.

FRAME FOR GANG-SAW MILLS.

SPECIFICATION formingpart of Letters Patent No. 256,499, dated April 18,1882.

Application filed February 19, 1881.

Gang-Saw Mills, which are fully set forth in the followingspecification, reference being had to the accompanying drawings, inwhich- Figure 1 represents a side elevation of a frame for a gang ofsaws embodying my improvements, and Fig. 2 a front elevation of thesame.

My present invention relates mainly to the construction and arrangementof the lower frame, on which the upper gang-frame is supported.

The invention consists of the special construction and arrangement ofthe main supports, whereby a broad base is obtained, and a bracingeffect in both directions, and at the same time the side is open, sothat the main shaft can be readily introduced or removed and themechanism in theframe rendered easily accessible.

I will first describe the special construction of a frame in which Ihave in one way embodied my invention, andthe special improvement, whichis believed to be new, and which it is desired to secure by LettersPatent, will be definitely pointed out in the claims;

As my present improvement relates solely to the frame,I have shown inthe drawings only the supporting-frame, a portion of the gang-frame, andthe main shaft, as these parts only are necessary for a fullunderstanding of In the drawings, A A represent the sections of the mainor supporting frame. These sec-' tions are made tapering from'the top tothe bottom, as shown in Fig.2 of the drawings, so as to give a muchbroader base than top. Preferably they are metallic frames, and areintended to be cast in substantially the form shown. These two sectionsare arranged transversely to the line of cut of the saws, one in frontand one in rear of the gang, and are inclined toward each other, asshown in Fig. 1 of the drawings, and arefirmly secured to a suitablefoundation, B, by bolts or other ordinary devices t'or this purpose. Itwill beseen (No model.)

that these two sections constitute akind of pyramidal support, the sidesof which are open, presenting afree and unobstructed space.

The gang-frame C is of ordinary construction, except that the sidepieces, 0, are spread toward the lower ends thereof, so as to make awider base-piece, c. This is to brace the tions A A in relation to eachother. When the gang-frame is in position obviously the enlarged orwidened bases of the side pieces will stand transversely to the sectionsof'the supportin g-frame, and the width of these pieces is to be suchthat they will reach across from the top of one section to the top ofthe other section of the supporting-frame, as shown in Fig. 1 of thedrawings.

The gang-frame is firmly secured to the supportingeframe, as shown inFig. 1 of the drawings, in which it will be seen that provision is madefor a bed for the sections of the gangframe and for flanges toaccommodate fastening-bolts, by means of which the two parts of thestructure are secured together.

The main or crank shaft D is of any ordinary construction. It will beseen, however, that a free unobstructed space is provided at the side ofthe frame, between the two sections A A, so that the gang-shaft canbe-introduced to its proper place beneath the gang-frame with greatfacility, and the mechanism inside the frame can be reached at any timewithout trouble for repairs or replacement directly from the side andwithout removing any parts of the mill. In frames of ordinaryconstruction this cannot be done.

With this improved construction of frame I obtain a pyramidal supportfor the gang with a bracing effect in both directions, so that the gangis firmer and steadier than in any other construction of which I'haveknowledge. I also provide for the ready introduction or removal of themain shaft and devices immediately connected therewith through the-openspace in the side of the frame.

The details of construction may of course be varied, the precise mode ofconnecting the supporting-frame and the gang-frame beinges= pecially oneof those details of construction which may be changed greatly withoutdepart= gang-frame to the main frame and the sec- 1 ing from theprinciple of my invention, and I do not limit myself to the specialdetails herein shown and described.

Having thus described my invention, what I claim as new,and desire tosecure by Letters Patent, is-

1. The lower or supporting frame composed of two independent sections, AA, arranged transversely to the line of cut and inclined toward eachother, in combination with the upper or saw frame, 0, the side pieces ofwhich, at their lower ends, rest 011 the lower frame and extend from onesection to the other of the latter, and are secured thereto, therebyuniting the said sections of the lower frame,

substantially as described.

DE WITT G. PRESCOTT.

Witnesses:

JNO. 0. MAoGRnGoR, ALICE HoLLis'rER'

